[PATCH v7 6/7] ARM: dts: sun8i-a83t: Add BananaPi M3 OV5640 camera overlay

[Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>]

Add an overlay supporting the OV5640 from the BananaPi Camera v3
peripheral board. The board has two sensors (OV5640 and OV8865)
which cannot be supported in parallel as they share the same reset
pin and the kernel currently has no support for this case.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
---
 arch/arm/boot/dts/allwinner/Makefile          |   1 +
 .../sun8i-a83t-bananapi-m3-camera-ov5640.dtso | 117 ++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso

diff --git a/arch/arm/boot/dts/allwinner/Makefile b/arch/arm/boot/dts/allwinner/Makefile
index eebb5a0c873a..a0a9aa6595e4 100644
--- a/arch/arm/boot/dts/allwinner/Makefile
+++ b/arch/arm/boot/dts/allwinner/Makefile
@@ -277,6 +277,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-a33-sinlinx-sina33.dtb \
 	sun8i-a83t-allwinner-h8homlet-v2.dtb \
 	sun8i-a83t-bananapi-m3.dtb \
+	sun8i-a83t-bananapi-m3-camera-ov5640.dtbo \
 	sun8i-a83t-cubietruck-plus.dtb \
 	sun8i-a83t-tbs-a711.dtb \
 	sun8i-h2-plus-bananapi-m2-zero.dtb \
diff --git a/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso b/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso
new file mode 100644
index 000000000000..5868ef11bdee
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0 OR X11
+/*
+ * Copyright 2022 Bootlin
+ * Author: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/sun8i-a83t-ccu.h>
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	/*
+	 * These regulators actually have DLDO4 tied to their EN pin, which is
+	 * described as input supply here for lack of a better representation.
+	 * Their actual supply is PS, which is always-on.
+	 */
+
+	ov5640_avdd: ov5640-avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-avdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov5640_dovdd: ov5640-dovdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-dovdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov5640_dvdd: ov5640-dvdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-dvdd";
+		regulator-min-microvolt = <1500000>;
+		regulator-max-microvolt = <1500000>;
+		vin-supply = <&reg_dldo4>;
+	};
+};
+
+&csi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&csi_8bit_parallel_pins>;
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			csi_in_ov5640: endpoint {
+				remote-endpoint = <&ov5640_out_csi>;
+				bus-width = <8>;
+				data-shift = <2>;
+				hsync-active = <1>;
+				vsync-active = <1>;
+				pclk-sample = <1>;
+			};
+		};
+	};
+};
+
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pe_pins>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	ov5640: camera@3c {
+		compatible = "ovti,ov5640";
+		reg = <0x3c>;
+
+		clocks = <&ccu CLK_CSI_MCLK>;
+		clock-names = "xclk";
+		assigned-clocks = <&ccu CLK_CSI_MCLK>;
+		assigned-clock-parents = <&osc24M>;
+		assigned-clock-rates = <24000000>;
+
+		AVDD-supply = <&ov5640_avdd>;
+		DOVDD-supply = <&ov5640_dovdd>;
+		DVDD-supply = <&ov5640_dvdd>;
+
+		powerdown-gpios = <&pio 3 15 GPIO_ACTIVE_HIGH>; /* PD15 */
+		reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
+
+		rotation = <180>;
+
+		port {
+			ov5640_out_csi: endpoint {
+				remote-endpoint = <&csi_in_ov5640>;
+				bus-width = <8>;
+				data-shift = <2>;
+				hsync-active = <1>; 
+				vsync-active = <1>;
+				pclk-sample = <1>;
+			};
+		};
+	};
+};
+
+&pio {
+	pinctrl-names = "default";
+	pinctrl-0 = <&csi_mclk_pin>;
+};
+
+&reg_dldo4 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+};
-- 
2.42.1